Search results

Daughter brought over her laptop today. A popup saying something like "Microsoft reports your computer is infected with a virus that is transmitting credit card and other info. Phone this 800 number for a fix." was blocking her Win10 Edge browser. She knew it was fake, but could not get...

There is a new Depth of Field page at Want to blur and hide the background? Comparing Depth of Field of Two Lenses It has a new DOF calculator, but it was not done to be general purpose. DofMaster is already a very good one. Specifically it computes Circle of Confusion at the background behind...

I put up a new page about 18% gray cards at 18% Gray Cards - What's the Idea? Basics about the card, but perhaps a new approach about actually saying a few obvious facts. Hopefully of interest.

I never do very well with responses to questions about flash actions. But I will try again. It seems a good thing to realize how the system works. The situation. When using TTL fill flash, we set -1 EV or -2 EV flash compensation, and it becomes point&shoot. But the camera automation (for...

This is like a poll. I would appreciate your doing this simple little test, and letting me know your Auto ISO result with flash for your Nikon DSLR camera model... either with response here or via PM. Just two quickie pictures, then look at ISO. I don't need to see any pictures. This can...

I did a thing here Shutter speed does not affect flash exposure to compare using continuous lights vs. a speedlgiht. It came out OK overall. I'm not much into CFL, but using a $20 Kill-A-Watt meter, I discovered that a no-brand-name 45 watt CFL from China measured only 26 watts (and 44 VA)...

My Firefox 44 has been fine, but a day or two ago, it broke here. Only on this site. Attempting to show any page on this site shows it, and shows all the ad links (seen on bottom status bar), and then probably quickly refreshes to show the last previous page instead, coming from a page on this...

Google Maps Street View is starting to drive down residential alleys recording. The alley at my house is not on line yet, but this is across the street from me: The camera is high above their car, and it sees over the fences. That's a shadow of the camera on the ground. I choose a real...

A calculator to compute fill flash "percentage" from TTL flash compensation is at Flash pictures are Double Exposures- Outdoors We hear manual flash users talking about using 20% or 30% fill flash. Well, TTL offers less coarse adjustment to do the same thing. -1 EV fill is 33%, and -2 EV...

People ask now and then, about how to determine the distance of an object in a photo. There is now a calculator to do this at Calculator to Determine Distance to Object or Subject in an Image You do have to supply several important details: The real size of the Object, the actual or...

The TV news shows, both local and the national news, really emphasizes Twitter and Facebook, as if that is all there is to internet and communication. Their own web sites and the concept of email are very largely ignored, any non-TV access is all about Twitter and Facebook. Any communication...

Win10 analysis says this old GS 7600 graphics card is not compatible. However, the card works great in Win7, and the Win7 and Win10 graphics system requirements are worded exactly the same... DirectX 9 or later with WDDM 1.0 driver. WDDM 1.0 was back with Vista, and it has DirectX 9. I also...

Rant... I've always imagined Duracell Coppertop AA alkalines were a quality battery, but the last couple of years, I'm seeing serious leakage problems from them. Like I never saw before. I would never consider alkaline in the speedlights, but there still are plenty, in TV and other remotes...

Plus the price is right too. :) I put a review of the Aperlite YH-700N flash at Review of the Aperlite YH-700N Speedlight For $90, it offers full power and features, including HSS and even a Commander Master mode (it can be a hot shoe commander). Plus remote mode too. Works nice, and HSS...

I have a survey basically of video screen size popularity, at Image resolution for the video monitor screen There was a previous error in it, causing some entries to be recorded several percent smaller than they were (CSS pixel ratio, mostly smart phones). I have fixed it, and reset it, so...

I posted this elsewhere, and it seemed to have some appeal, so I thought it ought to go here too. Second pass, added a bit. t.5 and t.1 are common terms and methods for measuring flash duration. Flashes have a rapid strong peak of light, and then slowly fades away (relatively slowly, a few...

One more review posted at Review of the Neewer VK750 II Speedlight This is the Neewer VK750 II speedlight. $56 seems an amazing price for such a lot of flash. A few less dollars than a Yongnuo YN560-II, but it does TTL too. And very well at that. I was surprised how often it seemed to get it...

I posted this Neewer NW-985N speedlight review at Review of the Neewer NW985N Speedlight It is an inexpensive flash ($65 Amazon), fully powered, fully featured, even HSS and Commander Remote. My opinion is its HSS does not work, and Remote mode with TTL Commander is a couple of stops deficient...

I'd like to ask a favor from anyone with a current model Nikon flash (SB-700 or SB-910) and a hot shoe extension cord, such as old SC-17, or new SC-28 or SC-29. Any of the cords, it doesn't matter. Hearing from both flash models would be good. Check out the effect at Review of the Yongnuo...

I just put a new Guide Number calculator on my page about Guide Number, at Understanding Guide Numbers It does the math to convert one Guide number (at full power level) at some ISO, to a new guide number at another ISO and/or another power level. It assumes still the same zoom (same angular...